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Sodium metabisulfite

Sodium metabisulfite

Product Name: Sodium metabisulfite（Tech grade/ food grade）
CAS NO: 7681-57-4
EC NO: 231-673-0
Molecular Formula: Na2S2O5
Molecular weight： 190.1
H.S code: 283210 0000
Specifications:

Item      Quality
Food grade     Tech  grade
Purity (Na2S2O5) :%   ≥97.5    ≥97.0
Sulfur dioxide( SO2):%   ≥65.0  ≥65.0
Arsenic ( As ):%   ≤0.0002 -
Heavy metal (Pb):%    ≤0.0005  
Iron (Fe) :  %  ≤0.001 ≤0.002
Insol. in water: %  ≤0.02 ≤0.05
PH-value :  4.0-4.8  4.0-4.8 
Note :Meet FCC V and E 223 standard

Appearance: White or light yellow crystal powder
Packing: 25/50/1000/1250kg pp woven bags with pe inner
Uses: Dyeing mordant; Dechlorination agent; Reducing agent and sulfonating agent for chemical industry and medicine; Bamboo, wood and paper fiber bleaching agent, mineral processing agent; Wastewater treatment agent, etc.; Food grade is used as preservative, preservative, bleaching agent, etc.





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